Summary: Chinese authorities locked down after discovering two cases of omicron in Anyang, a city of 5.5 million people about 300 miles outside Beijing. It's the third Chinese city now in lockdown and comes less than a month before the Beijing Olympics. These lockdowns are tests of China's zero-COVID policy, which authorities have called a success. But critics ask: at what cost? Nick Schifrin reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
